CVE-2026-7156 CRITICAL

CVE-2026-7156: Totolink A8000RU CGI cstecgi.cgi CsteSystem os command injection

Vendor Totolink
Product A8000RU
Weakness CWE-78
Published April 27, 2026
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. Affected is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP results in os command injection. The attack may be launched remotely. The exploit is now public and may be used.

Key dates

02Disclosure timeline

April 27, 2026 CVE published
April 28, 2026 Record updated